The British broadcaster was found to have committed a "serious breach" of broadcasting rules by omitting to mention that the narrator of a film about the Gaza situation was the son of a Hamas official, as determined by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a serious error in relation to accuracy".
Ofcom has instructed the broadcaster to air a evening announcement about its findings.
"Given this constitutes a serious breach of our regulations, we are instructing the broadcaster to broadcast a announcement of our determinations against it on the BBC's second channel at 21:00, with a date to be determined," the statement read.
'Possibility to Undermine Trust'
The authority's report declared: "Our probe determined that the programme's failure to disclose that the narrator's male guardian served in a post in the Hamas-controlled authority was substantially inaccurate.
"This implied that the viewers did not have essential details which may have been extremely pertinent to their judgment of the voice and the details he shared.
"Credibility is at the core of the bond between a television network and its public, particularly for a national broadcasting corporation such as the BBC.
"This oversight had the possibility to damage the very considerable degrees of credibility that audiences would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The programme was removed from the online platform in February after the boy's familial connections emerged, and in this past July an internal BBC review found it breached the organization's editorial guidelines on accuracy.
A BBC spokesperson commented: "The Ofcom ruling is in accordance with the results of the corporation's inquiry, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the regulator's ruling in its entirety. We will adhere to the directive as soon as the date and wording are determined."
